Properties of Triangles

What's Included

Properties of Triangles

Students learn about the properties of triangles. They explore the various unique triangles that can be made on a square and isometric grid.To begin the lesson students recap the names of common 2D shapes. In the development phase they are challenged to create siz unique triangles on a 3 by 3 grid. The end of the lesson challenges them to consider why some properties in triangles are impossible.

Differentiated Learning Objectives

All students should be able to identify an isosceles, equilateral, right-angle and scalene triangle.

Most students should be able to know the properties of different types of triangles.

Some students should be able to create all the unique triangles on a 4 by 4 grid.

Mr Mathematics Blog

When calculating the volume of a pyramid we can substitute the values of the length, width and perpendicular height into the formula V = 1/3 lwh. In my experience this is often provided for the students with little explanation as to why a volume of a pyramid is exactly one third the volume of a […]

When teaching solving 3D problems using trigonometry we begin the lesson with a recap of Pythagoras’ Theorem and the three trigonometric ratios. We do this by matching the ratio and equations to the respective right-angled triangle. Students are encouraged to work in pairs and to show the diagrams as part of the working out on […]

When I teach rounding to a significant figure, I ask the class to discuss in pairs or small groups a definition for the word significant. It is a word that all the students have heard before but not all are able to define. After 2 or 3 minutes of conversation I ask the students to […]